PWR_Exported_Constants

Modules
	PWR_PVD_detection_level
	PWR_Regulator_state_in_STOP_mode
	PWR_STOP_mode_entry

Functions
void	PWR_DeInit (void)
	Deinitializes the PWR peripheral registers to their default reset values. More...
void	PWR_BackupAccessCmd (FunctionalState NewState)
	Enables or disables access to the backup domain (RTC registers, RTC backup data registers and backup SRAM). More...
void	PWR_PVDLevelConfig (uint32_t PWR_PVDLevel)
	Configures the voltage threshold detected by the Power Voltage Detector(PVD). More...
void	PWR_PVDCmd (FunctionalState NewState)
	Enables or disables the Power Voltage Detector(PVD). More...
void	PWR_WakeUpPinCmd (FunctionalState NewState)
	Enables or disables the WakeUp Pin functionality. More...
void	PWR_BackupRegulatorCmd (FunctionalState NewState)
	Enables or disables the Backup Regulator. More...
void	PWR_MainRegulatorModeConfig (uint32_t PWR_Regulator_Voltage)
	Configures the main internal regulator output voltage. More...
void	PWR_FlashPowerDownCmd (FunctionalState NewState)
	Enables or disables the Flash Power Down in STOP mode. More...
void	PWR_EnterSTOPMode (uint32_t PWR_Regulator, uint8_t PWR_STOPEntry)
	Enters STOP mode. More...
void	PWR_EnterSTANDBYMode (void)
	Enters STANDBY mode. More...
FlagStatus	PWR_GetFlagStatus (uint32_t PWR_FLAG)
	Checks whether the specified PWR flag is set or not. More...
void	PWR_ClearFlag (uint32_t PWR_FLAG)
	Clears the PWR's pending flags. More...

Detailed Description

Function Documentation

void PWR_BackupAccessCmd

(

FunctionalState

NewState

)

Enables or disables access to the backup domain (RTC registers, RTC backup data registers and backup SRAM).

Note

If the HSE divided by 2, 3, ..31 is used as the RTC clock, the Backup Domain Access should be kept enabled.

Parameters

NewState,:

new state of the access to the backup domain. This parameter can be: ENABLE or DISABLE.

Return values

None

void PWR_BackupRegulatorCmd

(

FunctionalState

NewState

)

Enables or disables the Backup Regulator.

Parameters

NewState,:

new state of the Backup Regulator. This parameter can be: ENABLE or DISABLE.

Return values

None

void PWR_ClearFlag

(

uint32_t

PWR_FLAG

)

Clears the PWR's pending flags.

Parameters

PWR_FLAG,:

specifies the flag to clear. This parameter can be one of the following values: PWR_FLAG_WU: Wake Up flag PWR_FLAG_SB: StandBy flag

Return values

None

void PWR_DeInit

(

void

)

Deinitializes the PWR peripheral registers to their default reset values.

Parameters

None

Return values

None

void PWR_EnterSTANDBYMode

(

void

)

Enters STANDBY mode.

Note

In Standby mode, all I/O pins are high impedance except for:

• Reset pad (still available)
• RTC_AF1 pin (PC13) if configured for tamper, time-stamp, RTC Alarm out, or RTC clock calibration out.
• RTC_AF2 pin (PI8) if configured for tamper or time-stamp.
• WKUP pin 1 (PA0) if enabled.

Parameters

None

Return values

None

void PWR_EnterSTOPMode	(	uint32_t	PWR_Regulator,
		uint8_t	PWR_STOPEntry
	)

Enters STOP mode.

Note

In Stop mode, all I/O pins keep the same state as in Run mode.

When exiting Stop mode by issuing an interrupt or a wakeup event, the HSI RC oscillator is selected as system clock.

When the voltage regulator operates in low power mode, an additional startup delay is incurred when waking up from Stop mode. By keeping the internal regulator ON during Stop mode, the consumption is higher although the startup time is reduced.

Parameters

PWR_Regulator,:	specifies the regulator state in STOP mode. This parameter can be one of the following values: PWR_Regulator_ON: STOP mode with regulator ON PWR_Regulator_LowPower: STOP mode with regulator in low power mode
PWR_STOPEntry,:	specifies if STOP mode in entered with WFI or WFE instruction. This parameter can be one of the following values: PWR_STOPEntry_WFI: enter STOP mode with WFI instruction PWR_STOPEntry_WFE: enter STOP mode with WFE instruction

Return values

None

void PWR_FlashPowerDownCmd

(

FunctionalState

NewState

)

Enables or disables the Flash Power Down in STOP mode.

Parameters

NewState,:

new state of the Flash power mode. This parameter can be: ENABLE or DISABLE.

Return values

None

FlagStatus PWR_GetFlagStatus

(

uint32_t

PWR_FLAG

)

Checks whether the specified PWR flag is set or not.

Parameters

PWR_FLAG,:

specifies the flag to check. This parameter can be one of the following values: PWR_FLAG_WU: Wake Up flag. This flag indicates that a wakeup event was received from the WKUP pin or from the RTC alarm (Alarm A or Alarm B), RTC Tamper event, RTC TimeStamp event or RTC Wakeup. An additional wakeup event is detected if the WKUP pin is enabled (by setting the EWUP bit) when the WKUP pin level is already high. PWR_FLAG_SB: StandBy flag. This flag indicates that the system was resumed from StandBy mode. PWR_FLAG_PVDO: PVD Output. This flag is valid only if PVD is enabled by the PWR_PVDCmd() function. The PVD is stopped by Standby mode For this reason, this bit is equal to 0 after Standby or reset until the PVDE bit is set. PWR_FLAG_BRR: Backup regulator ready flag. This bit is not reset when the device wakes up from Standby mode or by a system reset or power reset. PWR_FLAG_VOSRDY: This flag indicates that the Regulator voltage scaling output selection is ready.

Return values

The	new state of PWR_FLAG (SET or RESET).

void PWR_MainRegulatorModeConfig

(

uint32_t

PWR_Regulator_Voltage

)

Configures the main internal regulator output voltage.

Parameters

PWR_Regulator_Voltage,:

specifies the regulator output voltage to achieve a tradeoff between performance and power consumption when the device does not operate at the maximum frequency (refer to the datasheets for more details). This parameter can be one of the following values: PWR_Regulator_Voltage_Scale1: Regulator voltage output Scale 1 mode, System frequency up to 168 MHz. PWR_Regulator_Voltage_Scale2: Regulator voltage output Scale 2 mode, System frequency up to 144 MHz.

Return values

None

void PWR_PVDCmd

(

FunctionalState

NewState

)

Enables or disables the Power Voltage Detector(PVD).

Parameters

NewState,:

new state of the PVD. This parameter can be: ENABLE or DISABLE.

Return values

None

void PWR_PVDLevelConfig

(

uint32_t

PWR_PVDLevel

)

Configures the voltage threshold detected by the Power Voltage Detector(PVD).

Parameters

PWR_PVDLevel,:

specifies the PVD detection level This parameter can be one of the following values: PWR_PVDLevel_0 PWR_PVDLevel_1 PWR_PVDLevel_2 PWR_PVDLevel_3 PWR_PVDLevel_4 PWR_PVDLevel_5 PWR_PVDLevel_6 PWR_PVDLevel_7

Note

Refer to the electrical characteristics of your device datasheet for more details about the voltage threshold corresponding to each detection level.

Return values

None

void PWR_WakeUpPinCmd

(

FunctionalState

NewState

)

Enables or disables the WakeUp Pin functionality.

Parameters

NewState,:

new state of the WakeUp Pin functionality. This parameter can be: ENABLE or DISABLE.

Return values

None